Lapping machine



Feb. '10, 1925- r 1,525,671

T. SPINNER ET AL LAPPING MACHINE Filed. Nov. 1923. 2 Sheets-Sheet 272500086 Jp/Awas: HMO 077w W4? 150/115,

Patented Feb. 10, 1925.

v UNITED V STATES PATENT OFFICE.

THEODORE SPINNER AND OTTO WM. BOI-ILEN, OF ST. LOUIS, MISSOURI.

LAPPING MACHINE.

Application filed November To all whom it may concern:

Be it known that we, Trinooonn SPINNER and O'r'ro M. BOHLEN, citizens ofthe United States, residing at St. Louis, Missouri, have invented newand useful Improvements in Lapping Machines, of which the following is aspecification, reference being had to the accompanying drawings.

Our invention relates to improvements in lapping machines and isparticularly designed for use in connection with the recon: ditioning ofcylinders for internal combustion engines.

Our object is to provide a machine of sim- F pie, durable andinexpensive construction comprising a support for an engine block, whichis adjustable for adaptation to blocks of varying dimensions and meanscomprising a movable lapping element havlng adjustable devices foradapting it to cylinders of varying lengths and differentv relativespacings of cylinders.

Our improvements consist in the novel construction, arrangement andcombination of elements, as hereinafter fully, clearly and conciselydescribed, definitely pointed out in our claimsand illustrated by the accompany drawings, (2 sheets) in wh1ch:

Figure 1 is an elevation of a machlne constructed in accordance with ourinvention.

Figure 2 is an end view of the machine.

Figure 3 is a fragmental plan view of the machine, and

Figure 4 is an enlarged elevation of the movement for the lappingelements.

Referring to the drawings, 5 designates a frame comprising flanged rails6 and 7 extending lengthwise of the frame and having bolt and slotconnections 8 therewith whereby the two rails may be relativelylaterally adjusted tlo fit therebetween an engine block, such as 9, andwhich ralls are provided with spaced slots 10 for the securement of theengine blocks to the rails.

At the top of the frame there are bearings 11 in which is journalled ashaft 12 disposed lengthwise of the machine over the recited rails 6 and7.

Carried by the shaft is a belt pulley 13 arranged for connection anddisconnection with a source of power by a clutch 13.

By preference, at least a portion of the length of the shaft 12 is ofnon-circular section and mounted upon this portion of the shaft are oneor more eccentrics 14;, with 30, 1921. Serial No. 518,971.

straps 15 for the support and operation of the lapping element orelements 16.

By preference we employ as the lapping elements, ordinary pistons whichwhen reciprocated in the cylinders in the presence of an abradant, suchas powdered emer and oil, act upon the cylinder surfacesto true andreshape them as well as clean them of carbon and other foreign matter.

For the varying the stroke of the lapping element, the eccentric lat isprovided with an opening 17 in eccentric arrangement in which there ismounted a second eccentric 18, having a non-circular opening 19 forfitment over the shaft 12 and which opening 19 is in eccentricarrangement relative to the second eccentric 18.

Obviously by rotating the second or inner eccentric 18 relative to thefirst or outer eccentric the path or orbit of the eccentric strap 15will be varied to cause variation in the strokes of the lapping machine.

The opening 17 is provided with teeth 20 for mesh with a pinion 21mounted in a cavity 22 formed in the second or inner eccentric, open tothe opening 17 in the first or outer eccentric, and is held in place bystraps 23, secured to the inner eccentric and which pinion includes asocket 21 to provide for its rotation.

Obviously upon a rotation of the pinion 21, the inner eccentric may bereadily ro tated relative to the outer eccentric and when set may belocked in its selected set position as by a Wedge 24.

For adapting the machine to] varying cylinder lengths, we provide athreaded stem 25 extending from the eccentric strap which carries a bar26 and connect with the bar a pair of threaded stems 27, 27 forconnection with the box or bearing element 28 of the piston rod, whichis the showing for the recited lapping element and which is, or may be,an ordinary piston.

What we claim as new is 1. A lapping machine for cylinder blocks ofvarying sizes comprising a frame for supporting the cylinder blocks,said frame having two cylinder blocks supporting beams and means forsecuring said beams in varying relation to accommodate the cylin derblocks of varying sizes, a lapping ele ment, and means for actuatingsaid lapping element.

2. A lapping machine comprising a frame having two cylinder blocksupporting beams element, said means being adjustableii-fors;

use with varying sized cylinders.

3. A lapping machine for cylinder blocks of varying sizes comprising aframe for supporting tli'e' cylin der blocks, said fra ne'ha-V mg twospaced-supporting beams andfn ieans for ad isting'said beams laterallyof the frame to vary the distance betiveeirtlie beams toaccommodatecylinder blocksof 'ai'yiiig sizes, means associatedfwitlisaid beams for seiuring the cylinderblocksther on, a rotary shaft, meansforsi'ipportmg said shaft on said frame above said beams, a I

lapping eleinent,=ai 1d means moiinted on said sliaftfoi actuatingsaid-lapping element.

4. A "lapping machinefor cyliiidei bloeks of -varying sizes Comprisingwhom/Zo al} frame for supporting the cylinder blocks;

said frame having two cylinder supporting beams; spaced-from each other:laterally of the frame. and means for securing said beams in varyingspaced relation to support cylinder blocks of; varying sizes, meansassociated with said beams for securing the cylinder blQQ'kSailIBlGOD,a. rotary shaft, means for supporting said shaft on said frame abovesaid beamsya'l apping element, means mounted on said shaft foractuatingsaidlapping element, and means 7 for I adjusting said actuatingmeans for adapting said' -la pping element tocylinders of differentlengths.

5. 'llipniaclriiie as -defin'ed by -cla-iin 4 in whiclisaid lastIDQHtlOliGd' adjusting-ineaiis comprises inner and outer eccentricsconnected to'g etl' er whereby the former-actuates the latter and meansfoi'uvarying the -'dis-- THEODORE SPINNER; OTTO. WM. BO-HLEN;

